Three images were taken on Sol 1447 from the Mast Camera on the Curiosity Rover of two buttes on Mars that have odd and interesting features.
NASA/JPL/MSSS Original Images:
http://mars.jpl.nasa.gov/msl-raw-images/msss/01447/mcam/1447ML0071660010602722E01_DXXX.jpg
http://mars.jpl.nasa.gov/msl-raw-images/msss/01447/mcam/1447ML0071640010602717E01_DXXX.jpg
http://mars.jpl.nasa.gov/msl-raw-images/msss/01447/mcam/1447ML0071620010602712E01_DXXX.jpg
Enhanced images of the above original images:
1447ML0071660010602722E01_DXXX-enhanced.jpg
1447ML0071640010602717E01_DXXX-enhanced.jpg
1447ML0071620010602712E01_DXXX-enhanced.jpg
Zoomed in portions of the above enhanced images:
You can check out more fascinating Mars anomalies here: Mars Anomalies